My mother kept the first utility bill of the year for electricity, natural gas, water and sewer, etc. She lived in the same house for 42 years and liked to be

My mother kept the first utility bill of the year for electricity, natural gas, water and sewer, etc. She lived in the same house for 42 years and liked to be able to see how much the amounts had changed over the years. I’m not sure it was tremendously useful but she could verify her feeling that water and sewer increased disproportionately to the others, for example.